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Supplemental Cash Flow Information of the Operating Partnership - Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	$ 855,007	$ 510,163	$ 476,358	$ 347,379
Restricted cash	0	0	0	0
Cash and cash equivalents and restricted cash	855,007	510,163	476,358	347,379
Kilroy Realty L.P.
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	855,007	510,163	476,358	347,379
Restricted cash	0	0	0	0
Cash and cash equivalents and restricted cash	$ 855,007	$ 510,163	$ 476,358	$ 347,379

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